I have a HS Precision RDR in .308 this rifle came with one 5rd mag that works NO problem in my rifle. A friend of a friend has the same rifle and he has two 10rd HS mags that work great in his rifle but will not work at all in my rifle? They will not lock into place and are very sloppy. The two rifles appear to have slightly different bottom metal. Does anyone else own an HS rifle and is experiencing any of these problems? The 5rd mags are crippling me in precision matches. I called HS about this and they told me that all of there bottom metal is the same and the mags should work! The guy I spoke to was very short with me on the phone and didn’t seem like he wanted to help me. I kinda think they just don't want to admit they made different bottom on the earlier made rifles so they don’t have to fix or replace anything for free. Plus mags are a 130$ a pop! Any thoughts?